NINDEJIN 12.9-912 Hex Socket Cap Screw Features and Specifications
The 12.9 grade carbon steel composition delivers tensile strength exceeding 1,200 megapascals, ensuring reliable performance under high-stress conditions in industrial and professional applications. DIN912 engineering standards guarantee precise hex socket dimensions across all ten metric sizes, eliminating wobble and slip during installation with Allen keys. Each NINDEJIN 12.9-912 screw meets strict material certifications, with hardened shank and full-length threading for maximum holding power. The black oxide finish resists corrosion in workshop environments while maintaining the bright appeal of quality fasteners. Multiple M-size options from M1.6 through M10 ensure you find the exact specification for machinery assembly, structural repair, or precision equipment building.
a***r –
Just as described – no issues. Description matches product and shipping was also fast and prompt.
J***r –
Always great hardware that is tough and strong very easy
AliExpress Shopper –
Ast shipping to us and well packed. Hardware looks great
a***r –
Just as described – no issues. Description matches product and shipping was also fast and prompt.
AliExpress Shopper –
A great price for the hardware. Shipped and received quickly.
T***i –
Ok
a***r –
Just as described – no issues. Description matches product and shipping was also fast and prompt.
A***i –
If you’re tired of stripped heads and ugly silver hardware, these black hex screws are a total game-changer. The matte finish gives any build an “industrial-chic” look that actually stays clean. Unlike cheap phillips screws that turn to mush under pressure, the hex drive handles heavy torque with zero slipping. They feel incredibly solid and bite into material with precision. Just a heads-up: they thrive best indoors or under a hood, as the black oxide can get grumpy in heavy rain. For a professional, high-strength finish, you really can’t beat these for the price.
I***h –
I copied my review to each item i order : nice.. may be better . I ordered different sizes. Each size was in separate bubble package and inside another plastic bag with marked size on them. I’ve seen same items from different sellers like twice expensive and charging delivery for each item…. crazy… But if i would go get it from our local store.. whatever i can get for $10… local store would charge over $100. Welcome to america i guess..
AliExpress Shopper –
If you’re looking for a fastener that says “industrial chic” while pulling its weight in a heavy-duty build, the black hex head screw is your go-to. It’s the reliable workhorse of the hardware world, favored for its grip and high-torque capabilities.
Why they’re a staple
Unlike standard phillips heads that love to strip when you apply pressure, the hexagonal head provides six points of contact for your socket or wrench. This allows for significantly more torque without the tool slipping.
T***i –
Ok
AliExpress Shopper –
A great price for the hardware. Shipped and received quickly.
I***h –
I copied my review to each item i order : nice.. may be better . I ordered different sizes. Each size was in separate bubble package and inside another plastic bag with marked size on them. I’ve seen same items from different sellers like twice expensive and charging delivery for each item…. crazy… But if i would go get it from our local store.. whatever i can get for $10… local store would charge over $100. Welcome to america i guess..
AliExpress Shopper –
Came in with quick shipping and they were exactly as described
Y***t –
Perfect
AliExpress Shopper –
Items were shipped and received quickly. Quality looks good and consistent
I***h –
I copied my review to each item i order : nice.. may be better . I ordered different sizes. Each size was in separate bubble package and inside another plastic bag with marked size on them. I’ve seen same items from different sellers like twice expensive and charging delivery for each item…. crazy… But if i would go get it from our local store.. whatever i can get for $10… local store would charge over $100. Welcome to america i guess..
a***r –
Just as described – no issues. Description matches product and shipping was also fast and prompt.
AliExpress Shopper –
If you’re looking for a fastener that says “industrial chic” while pulling its weight in a heavy-duty build, the black hex head screw is your go-to. It’s the reliable workhorse of the hardware world, favored for its grip and high-torque capabilities.
Why they’re a staple
Unlike standard phillips heads that love to strip when you apply pressure, the hexagonal head provides six points of contact for your socket or wrench. This allows for significantly more torque without the tool slipping.
a***r –
Just as described – no issues. Description matches product and shipping was also fast and prompt.
I***h –
I copied my review to each item i order : nice.. may be better . I ordered different sizes. Each size was in separate bubble package and inside another plastic bag with marked size on them. I’ve seen same items from different sellers like twice expensive and charging delivery for each item…. crazy… But if i would go get it from our local store.. whatever i can get for $10… local store would charge over $100. Welcome to america i guess..
AliExpress Shopper –
Items were shipped and received quickly. Quality looks good and consistent
T***i –
Ok
3***g –
These bolts made me run faster and jump higher than ever
AliExpress Shopper –
Correct description
a***r –
Just as described – no issues. Description matches product and shipping was also fast and prompt.
T***i –
Ok
a***r –
Just as described – no issues. Description matches product and shipping was also fast and prompt.
AliExpress Shopper –
Just what i needed for my project. I will likely buy more when i need them again. M5 x 0.80mm 10 per package.
a***r –
Just as described – no issues. Description matches product and shipping was also fast and prompt.
a***r –
Just as described – no issues. Description matches product and shipping was also fast and prompt.
AliExpress Shopper –
A great price for the hardware. Shipped and received quickly.
AliExpress Shopper –
Nice
w***l –
Full thread
Untested
Coins coins coins coins coins
T***i –
Ok
r***t –
Everything is fine 100%
AliExpress Shopper –
A great price for the hardware. Shipped and received quickly.
AliExpress Shopper –
Screws seem to be of high quality, for the price i cannot complain whatsoever. I would order again.
AliExpress Shopper –
Screws look great and work great. Price is very good as well
a***r –
Just as described – no issues. Description matches product and shipping was also fast and prompt.
a***r –
Just as described – no issues. Description matches product and shipping was also fast and prompt.
J***n –
Disappointed. Thought they were larger. Guess i need to learn more about metric sizes. Took a long time to get here.
AliExpress Shopper –
Items were shipped and received quickly. Quality looks good and consistent
AliExpress Shopper –
Fast shipping to us and well packed. Hardware looks great
I***h –
I copied my review to each item i order : nice.. may be better . I ordered different sizes. Each size was in separate bubble package and inside another plastic bag with marked size on them. I’ve seen same items from different sellers like twice expensive and charging delivery for each item…. crazy… But if i would go get it from our local store.. whatever i can get for $10… local store would charge over $100. Welcome to america i guess..
A***i –
These black oxide hex head screws are a massive upgrade over your standard zinc hardware.
Why they work
No stripping: the 6-point hex head allows for high-torque tightening. Unlike phillips heads, these won’t “cam out” when you’re cranking them down.
Pro aesthetic: the matte black finish is perfect for “stealth” builds, automotive work, or furniture where you want the hardware to disappear.
Industrial build: usually made from alloy steel, these feel significantly heavier and tougher than big-box store screws.
The trade-off
The black oxide coating looks great but offers moderate rust protection. If you are using these outdoors or in a boat, they will eventually tea-stain. For indoor or engine bay use, they are perfect.
Verdict: 9/10 for strength and style.
AliExpress Shopper –
This product is very good and i enjoyed it as i think others will too. Thank you seller for producing this great product.
I***h –
I copied my review to each item i order : nice.. may be better . I ordered different sizes. Each size was in separate bubble package and inside another plastic bag with marked size on them. I’ve seen same items from different sellers like twice expensive and charging delivery for each item…. crazy… But if i would go get it from our local store.. whatever i can get for $10… local store would charge over $100. Welcome to america i guess..
A***a –
Screw seems to be of high quality. I would order it again
K***i –
Perfect
a***r –
Just as described – no issues. Description matches product and shipping was also fast and prompt.
Y***t –
Perfect
T***i –
Ok
m***A –
Good quality
AliExpress Shopper –
Ast shipping to us and well packed. Hardware looks great
AliExpress Shopper –
Items were shipped and received quickly. Quality looks good and consistent
a***r –
Just as described – no issues. Description matches product and shipping was also fast and prompt.
J***T –
Good product, consistent with description. Nice low price.